Render + compositing error:
When adding renderlayer nodes in a composite, without having own
scene render, the renderlayer nodes were not tagged as changed,
causing compositing to give previous result.
Full Sample AA (FSA) was failing in cases. Bug report was an empty
scene (with compo nodes) linking in another .blend scene (with render).
That case gave warning "FSA not supported with rendering". That now is
allowed.
Then I noticed FSA was giving corrupt sample buffers or crashes in cases,
especially on first buffer, this appeared to be a missing compo tag on
first sample buffer.
Lastly, to make FSA render a tiny bit less frustrating: added render window
statistic to show which of the FSA steps is being done.
Displacement mapping didn't do linear interpolation between pixels,
causing render artefacts. Now it uses for image render without AA
a default interploation filter of 1 pixel size.
Fix provided by Miika Hamalainen. Thanks!
=======================
Added option to baked named "Bake From Multires" which is avaliable for
normals baking and displacement baking.
If this option is enabled, then no additional hi-res meshes and render
structures would be created . This saves plenty of memory and meshes
with millions of faces could be successfully baked in few minutes.
Baking happens from highest level against viewport subdivision level,
so workflow is following:
- Set viewport level to level at which texture would be applied
during final rendering.
- Choose Displacement/Normals baking.
- Enable "Bake From Multires" option.
- You're ready to bake.
Displacement baker had aditional option named "Low Resolution Mesh".
This option is used to set if you want texture for realtime (games)
usage.
Internally it does the following:
- If it's disabled, displacement is calculated from subdivided
viewport level, so texture looks "smooth" (it's how default
baked works).
- If it's enabled, dispalcement is calculated against unsubdivided
viewport levels. This leads to "scales". This isn;t useful for
offline renders much, but very useful for creating game textures.
Special thanks to Morten Mikkelsen (aka sparky) for all mathematics
and other work he've done fr this patch!
blender_add_lib now takes a separate include argument to suppress warnings in system includes (mostly ffmpeg & python).
also only build wm_apple.c on apple+carbon configuration.
The main purpose for this is to allow rendering motion blurred blender fluids in external renderers (eg. http://vimeo.com/21870635 ).
Python code snippet for interpreting this data here: http://www.pasteall.org/21577 . Cleaned up some ugly hacks in this area too
* Also added read-only access to scene.subframe to RNA - setting current frame and subframe should still go via scene.frame_set()
Made some improvements to the point density texture. Added support
for tweaking the falloff with a custom curve. Also coded new
falloff types based on the age or velocity of particles.
Also added a test break check to the volumetric shade cache code,
to avoid nasty hangups from the preview render (on render, exit,
etc).
Some notes about code status:
* The Blender modifications were fairly quickly put together, much more code
polish and work is needed to get this to a state where it can be committed
to trunk. Files created with this version may not work in future versions.
* Only simple path tracing is supported currently, but we intend to provide
finer control, and more options where it makes sense.
* For GPU rendering, only CUDA works currently. The intention is to have the
same kernel code compile for C++/OpenCL/CUDA, some more work is needed to
get OpenCL functional.
* There are two shading backends: GPU compatible and Open Shading Language.
Unfortunately, OSL only runs on the CPU currently, getting this to run on
the GPU would be a major undertaking, and is unlikely to be supported soon.
Additionally, it's not possible yet to write custom OSL shaders.
* There is some code for adaptive subdivision and displacement, but it's far
from finished. The intention is to eventually have a nice unified bump and
displacement system.
* The code currently has a number of fairly heavy dependencies: Boost,
OpenImageIO, GLEW, GLUT, and optionally OSL, Partio. This makes it difficult
to compile, we'll try to eliminate some, it may take a while before it
becomes easy to compile this.
